Substances that are considered acidic are also called alkaline, true or false

Answers

Answer 1

Answer: False
Alkaline is something we use everyday
Acid is something sour eg lemons

Answer 2

Answer: this answer has to be true

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What did researchers at Virginia Tech try using to help reforest post-mining site soil?

Answers

Answer:

Researchers at Virginia Tech decided to try using biochar to help reforest the post-mining site soil. They got permission to apply a layer of biochar to a post-mining site before it was reseeded and replanted.

Which polyatomic ion is found in the compound represented by the formula NaHCO3? (1) acetate (3) hydrogen sulfate (2) hydrogen carbonate (4) oxalate Any explanation for this question?

Answers

Well....the answer is HCO3....but i don't know what it is said in worded form.

Looking at the names....it is probably Hydrogen Carbonate

When 2 mol of Fe(s) reacts with Cl2(g) to form FeCl3(s) according to this equation, 799 kJ of energy is evolved. Calculate ΔrHo. A) -399.5 kJ mol^-1 B) -199.75 kJ mol^-1 C) 399.5 kJ mol^-1 D) 199.75 kJ mol^-1

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What reaction is depicted by the given equation:
Au3+ + 3e− Au

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The reaction represents an oxidation-reduction reaction where it shows the reduction reaction part. The Au is reduced from a charge of positive 3+ to a neutral charge. An oxidation-reduction reaction is any reaction that involves changes in the oxidation number by gaining or losing electrons.

Regarding the vaporization of water, which of the following is true? A. A great deal of heat must be lost by water to form hydrogen bonds and allow molecules to move farther apart. B. A great deal of heat must be absorbed by water to break hydrogen bonds and allow molecules to move farther apart. C. Vaporization of water is an exothermic process. D. Water must lose a great deal of heat before it will vaporize.

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Answer: B. A great deal of heat must be absorbed by water to break hydrogen bonds and allow molecules to move farther apart.

Explanation:

Vaporization is a physical process where liquid state changes to gaseous state.

$H_2O(l)\rightarrow H_2O(g)$

Water molecules are bonded by strong hydrogen bonding between the hydrogen atom and the electronegative oxygen atom. Thus water molecules present on the surface are strongly attracted by the molecules present below the surface.

Thus as liquid state has to be changed to gaseous state, the heat must be supplied and the reaction will be endothermic.The heat is used to break the inter molecular forces or the hydrogen bonds present in water to convert them to randomly moving gaseous state.

B. A great deal of heat must be absorbed by water to break hydrogen bonds and allow molecules to move farther apart.

In terms of energy and entropy, systems in nature tend to undergo changes toward(1) higher energy and higher entropy
(2) higher energy and lower entropy
(3) lower energy and higher entropy
(4) lower energy and lower entropy

Answers

In terms of energy and entropy, systems in nature tend to undergo changes toward lower energy and higher entropy. Entropy is important as it describes the flow and distribution of energy. For a process to to occur spontaneously, it is a necessary condition that the entropy of the system undergoing the process to increase. If the entropy decreases, then that process cannot occur spontaneously. It needs some work/ energy to be pumped in in order for the process to occur

In terms of energy and entropy, systems in nature tend to undergo changes toward lower energy and higher entropy.

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